英文關鍵字
tube
pipe
glass
bubble
hose
water
liquid
macro
blue
air
flowing
aqua
fluid
transparent
clear
substance
inside
filled
reservoir
vessel
movement
artery
laboratory
chemical
biological
analysis
research
medicine
beauty
flask
cosmetic
chemistry
study
experiment
health
scientific
light
motion
clean
background
isolated
detail
small
aquatic
aqueous
real
purity
nobody
fresh
texture
healthy